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    PROCESSOR AND METHOD FOR PROCESSING AN AUDIO SIGNAL USING TRUNCATED ANALYSIS OR SYNTHESIS WINDOW OVERLAP PORTIONS
    94.
    发明公开
    PROCESSOR AND METHOD FOR PROCESSING AN AUDIO SIGNAL USING TRUNCATED ANALYSIS OR SYNTHESIS WINDOW OVERLAP PORTIONS 审中-公开

    公开(公告)号：EP4191582A1

    公开(公告)日：2023-06-07

    申请号：EP23150316.0

    申请日：2015-07-24

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  NEUSINGER, Matthias ,  NIEDERMEIER, Andreas ,  SCHNELL, Markus

    IPC分类号： G10L19/022 ,  G10L19/025

    摘要： A processor for processing an audio signal (200), comprises: an analyzer (202) for deriving a window control signal (204) from the audio signal (200) indicating a change from a first asymmetric window (1400) to a second window (1402), or indicating a change from a third window (1450) to a fourth asymmetric window (1452), wherein the second window (1402) is shorter than the first window (1400), or wherein the third window (1450) is shorter than the fourth window (1452); a window constructor (206) for constructing the second window (1402) using a first overlap portion (800) of the first asymmetric window (1400), wherein the window constructor (206) is configured to determine a first overlap portion (1000) of the second window (1402) using a truncated first overlap portion of the first asymmetric window, or wherein the window constructor is configured to calculate a second overlap portion (1330) of the third window (1450) using a truncated second overlap portion (814) of the fourth asymmetric window (1452); and a windower (208) for applying the first and second windows or the third and fourth windows to obtain windowed audio signal portions (210).

    APPARATUS AND METHOD FOR MDCT M/S STEREO WITH GLOBAL ILD WITH IMPROVED MID/SIDE DECISION
    95.
    发明公开
    APPARATUS AND METHOD FOR MDCT M/S STEREO WITH GLOBAL ILD WITH IMPROVED MID/SIDE DECISION 审中-公开

    公开(公告)号：EP4123645A1

    公开(公告)日：2023-01-25

    申请号：EP22191567.1

    申请日：2017-01-20

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： RAVELLI, Emmanuel ,  SCHNELL, Markus ,  DÖHLA, Stefan ,  JAEGERS, Wolfgang ,  DIETZ, Martin ,  HELMRICH, Christian ,  MARKOVIC, Goran ,  FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  BAYER, Stefan ,  FUCHS, Guillaume ,  HERRE, Jürgen

    IPC分类号： G10L19/008 ,  G10L19/22 ,  G10L19/02

    摘要： Fig. 1 illustrates an apparatus for encoding a first channel and a second channel of an audio input signal comprising two or more channels to obtain an encoded audio signal according to an embodiment. The apparatus comprises a normalizer (110) configured to determine a normalization value for the audio input signal depending on the first channel of the audio input signal and depending on the second channel of the audio input signal, wherein the normalizer (110) is configured to determine a first channel and a second channel of a normalized audio signal by modifying, depending on the normalization value, at least one of the first channel and the second channel of the audio input signal. Moreover, the apparatus comprises an encoding unit (120) being configured to generate a processed audio signal having a first channel and a second channel, such that one or more spectral bands of the first channel of the processed audio signal are one or more spectral bands of the first channel of the normalized audio signal, such that one or more spectral bands of the second channel of the processed audio signal are one or more spectral bands of the second channel of the normalized audio signal, such that at least one spectral band of the first channel of the processed audio signal is a spectral band of a mid signal depending on a spectral band of the first channel of the normalized audio signal and depending on a spectral band of the second channel of the normalized audio signal, and such that at least one spectral band of the second channel of the processed audio signal is a spectral band of a side signal depending on a spectral band of the first channel of the normalized audio signal and depending on a spectral band of the second channel of the normalized audio signal. The encoding unit (120) is configured to encode the processed audio signal to obtain the encoded audio signal.